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经营范围
发明名称
SHAFT EXCAVATOR
摘要
申请公布号
JPH05287978(A)
申请公布日期
1993.11.02
申请号
JP19920082560
申请日期
1992.04.06
申请人
HITACHI ZOSEN CORP
发明人
YOSHIKAWA TADAO;HIRATA SHOZO
分类号
E21B7/00;E21B7/20;E21D1/03;(IPC1-7):E21D1/03
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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